全文引用自： https://www.cnblogs.com/noryes/p/5716673.html 朔方 算法系列：日歷算法 Copyright © 1900-2016, NORYES, All Rights Reserved. http://www.cnblogs.com/noryes/ 歡迎轉(zhuǎn)載，請(qǐng)保留此版權(quán)聲明。 --------------------------------------------------------------------------------------- 轉(zhuǎn)載自http://blog.csdn.net/orbit/article/details/7749723 1、概述 日歷在我們的生活中扮演著十分重要的角色，上班、上學(xué)、約會(huì)都離不開日歷。每年新年開始，人們都要更換新的日歷，你想知道未來一年的這么多天是怎么被確定下來的嗎？為什么去年的國(guó)慶節(jié)是星期五而今年的國(guó)慶節(jié)是星期三？那就來研究一下日歷算法吧。本文將介紹日歷的編排規(guī)則，確定某日是星期幾的計(jì)算方法，以及如何在計(jì)算機(jī)上打印某一年的年歷。 要研究日歷算法，首先要知道日歷的編排規(guī)則，也就是歷法。所謂歷法，指的就是推算年、月、日的時(shí)間長(zhǎng)度和它們之間的關(guān)系，指定時(shí)間序列的法則。我國(guó)的官方歷法是中國(guó)公歷，也就是世界通用...
https://product.tdk.com.cn/zh/contact/faq/capacitors-0010.html 電橋測(cè)試時(shí)功能選擇Cp(Cp-D)或Cs(Cs-D) 阻抗分析儀表可以測(cè)量稱作Cp的并聯(lián)電容或稱作Cs的串聯(lián)電容4。電路模式將取決于電容器的電容值（圖1）。當(dāng)C小而阻抗大時(shí)，C和Rp之間的并聯(lián)阻抗將會(huì)明顯高于Rs。因此用于測(cè)量電容量的儀表設(shè)置應(yīng)為Cp。當(dāng)C大而阻抗小時(shí)，C和Rp的并聯(lián)阻抗不太大。因此，儀表設(shè)置應(yīng)使用Cs來測(cè)量電容量。選擇阻抗設(shè)置的一個(gè)好的經(jīng)驗(yàn)規(guī)則是，對(duì)大于10kΩ的電容器阻抗值使用Cp，對(duì)小于10Ω的使用Cs。 圖1: 阻抗等效電路...
https://e2e.ti.com/blogs_/b/powerhouse/posts/how-to-reduce-acoustic-noise-of-mlccs-in-power-applications Other Parts Discussed in Post:?TPS51622 Multilayer ceramic capacitors (MLCCs) are popular in power electronics designs compared to traditional polymer capacitors for many reasons: An MLCC provides: A small profile with relatively higher capacitance. Very low equivalent series resistance (ESR). Very low equivalent series inductance (ESL). Lower impedance at higher frequencies. Non-polarization for easier mounting and manufacturing. Higher reliability over time compared to tantalum and aluminum electrolyte capacitors. Lower unit costs. However, MLCCs do not always sit quietly on the board and do their job. Sometimes they get bored and start to “sing.” This is due to the piezoelectric effect of the ceramic material, which has the same characteristi...
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